neil0311

The door jamb sticker on the 250 AWD with Dunlop SP 5000M tires says to run 35psi front and 37psi rear. I know that it's important to keep the same tires and match tire wear on front and rear with AWD.

Why does Lexus recommend different psi for front and rear on AWD? I have been running the same pressure on both and a little higher than recommended. Will this cause any damage to the AWD system over time?

Evitzee

No rule says that pressures have to be the same on the front and back of an AWD vehicle. My WRX specifies different pressures for front and back. It all has to do with power distribution, weight balance, and other factors. It's usually best to follow the directions of the engineers.

josephlee

your rear tires take most of the pressure during regular driving. During normal driving, its distribution is 30:70 front to rear ratio.